Center a bullet and associated text?

I have a style set for chapter headings in a document. It consists of a bullet and a few words. I want to center both the bullet and the text. When I try to do that just the text centers and the bullet stays at its set Number Indent setting. If I just force the Number Indent to approximately center everything then the next chapter header which has a longer text string appears shifted to the right. Am I missing something?

Example:

Desired - I. Introduction
II. Competitive Solutions

Actual - I. Introduction
II. Competitive Solutions

Indented - I. Introduction
II. Competitive Solutions